petsc-3.11.4 2019-09-28

KSPGetOperators

Gets the matrix associated with the linear system and a (possibly) different one associated with the preconditioner.

#include "petscksp.h" 
PetscErrorCode  KSPGetOperators(KSP ksp,Mat *Amat,Mat *Pmat)

Collective on KSP and Mat

ksp -the KSP context

	Amat	- the matrix that defines the linear system
	Pmat	- the matrix to be used in constructing the preconditioner, usually the same as Amat.

DOES NOT increase the reference counts of the matrix, so you should NOT destroy them.

KSP, set, get, operators, matrix, preconditioner, linear system

intermediate